diff options
| author |   Zhao Heming <heming.zhao@suse.com> | 2020-10-06 00:00:23 +0800 |
|---|---|---|
| committer |   Song Liu <songliubraving@fb.com> | 2020-10-08 22:31:29 -0700 |
| commit | a913096decbf4101271e7d87b9affb1454bb7676 (patch) | |
| tree | 7bac2ad259872d46457d3fb351ddbe75f79e55a2 | |
| parent | md/raid0: remove unused function is_io_in_chunk_boundary() (diff) | |
| download | linux-dev-a913096decbf4101271e7d87b9affb1454bb7676.tar.xz linux-dev-a913096decbf4101271e7d87b9affb1454bb7676.zip | |
md/bitmap: md_bitmap_read_sb uses wrong bitmap blocks
The patched code is used to get chunks number, should use round-up div
to replace current sector_div. The same code is in md_bitmap_resize():
```
chunks = DIV_ROUND_UP_SECTOR_T(blocks, 1 << chunkshift);
```
Signed-off-by: Zhao Heming <heming.zhao@suse.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
| -rw-r--r-- | drivers/md/md-bitmap.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 55b757a223a4..cd9a12ca281d 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -606,8 +606,8 @@ re_read: if (bitmap->cluster_slot >= 0) { sector_t bm_blocks = bitmap->mddev->resync_max_sectors; - sector_div(bm_blocks, - bitmap->mddev->bitmap_info.chunksize >> 9); + bm_blocks = DIV_ROUND_UP_SECTOR_T(bm_blocks, + (bitmap->mddev->bitmap_info.chunksize >> 9)); /* bits to bytes */ bm_blocks = ((bm_blocks+7) >> 3) + sizeof(bitmap_super_t); /* to 4k blocks */ |